Some people believe that global warming is just the conspiracy to control the development of industrial country. Sometime, I think so. What about you?
Scientists worldwide agree that global warming is happening, and that human activity causes it...
No they do not.
They typically may say something like human activity is a partial factor.
It depends on semantics....
No, none of that double talk is necessary at all.
Human activity is simply one dimension affecting climate, and within that, there are regional issues such as the "brown cloud" over Asia, farming techniques, deforestation, and then in one corner a group of issues concerning co2.
Of course politicians latch on these to attempt to exert control. So yes, conspiracies certainly exist.
Yes, there are other factors besides Humans. The consensus is that Humans are the primary factor, not that it is the sole factor.
And yes, politicians are definitely exploiting the situation. Some are motivated by the money that is coming in from the fossil fuel industry or simply 'beating the left' , some are motivated by the renewable energy industry or the desire to 'beat the right'.
All we can do is look at the research objectively, which shows that it's extremely likely humans are the primary cause of global warming.
The mathematical factor "climate sensitivity" is the technical way of describing effect of humans.
This replaces vague words like "primary" "likely" blah blah with simple estimated constant.